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<p>I hope not. It's what my engine builder used--30W--in my 'new'
BJ8 engine for break-in; he swears by it. He says to keep it in
for 500 miles. He also says while Valvoline 20W-50 is good, to
add ZDDP additive to it.</p>
<p>Bob<br>
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<div class="moz-cite-prefix">On 3/17/2017 5:30 PM, Michael MacLean
wrote:<br>
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<blockquote
cite="mid:336437506.2507068.1489797029464@mail.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:times
new roman, new york, times, serif;font-size:16px">
<div id="yui_3_16_0_ym19_1_1489788431818_113118">What do you
think of Lucas Break in oil. Says it is 3600 PPM of zinc. Is
that too much?<br>
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<div id="yui_3_16_0_ym19_1_1489788431818_113151" dir="ltr">Mike
MacLean<br>
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